Combined calculator ruler, and desk tray



FIG. 1 is a top plan view of a combined calculator, ruler, and desk tray showing my new design in closed condition;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view;

FIG. 4 is a left end elevational view;

FIG. 5 is a right end elevational view; and

FIG. 6 is a perspective view of the design in open condition. 

The ornamental design for a combined calculator, ruler and desk tray, substantially as shown and described. 